Some info - those files come directly from the Sansa Updater app. After the updated firmware has been downloaded via the Sansa Updater, the firmware file is plain visible in the root folder of the Sansa (before you disconnect/reboot the Sansa, when the actual upgrade takes place - after that it's gone). There's no hacking/magic to it, everybody can get those files very easily. It's a hassle that SanDisk doesn't make these files available via FTP or HTTP, to spare us the annoyance of installing their obnoxious Updater app... (Files can now also be downloaded from http://forums.sandisk.com/ - thanks, SanDisk!)